4221778 has 8 divisors (see below), whose sum is σ = 6908400. Its totient is φ = 1918980.

The previous prime is 4221769. The next prime is 4221779. The reversal of 4221778 is 8771224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (4221779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95928 + ... + 95971.

It is an arithmetic number, because the mean of its divisors is an integer number (863550).

Almost surely, 2^4221778 is an apocalyptic number.

4221778 is a deficient number, since it is larger than the sum of its proper divisors (2686622).

4221778 is a wasteful number, since it uses less digits than its factorization.

4221778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191912.

The product of its digits is 6272, while the sum is 31.

The square root of 4221778 is about 2054.6965712728. The cubic root of 4221778 is about 161.6212510448.

The spelling of 4221778 in words is "four million, two hundred twenty-one thousand, seven hundred seventy-eight".